This comprehensive Harley Davidson Service Manual covers the SV Big Twin V-Twin Flathead models produced from 1937 to 1959. It provides detailed, step-by-step instructions and illustrations for all aspects of repair, service, restoration, maintenance, rebuild, and diagnosis. Whether you are a professional mechanic, an enthusiast, or a DIYer, this manual is an invaluable resource. Its content is identical to what professional technicians, mechanics, and workshops use. The manual covers everything from basic maintenance procedures to complex engine overhauls, providing in-depth information on components such as the engine, transmission, clutch, brakes, suspension, electrical system, and more. It includes exploded views, component breakdowns, part numbers, torque specifications, and troubleshooting tips. This manual is your essential guide to ensuring your classic Harley Davidson runs smoothly and reliably.

## The Harley-Davidson SV Big Twin V-Twin Flathead: A Legendary Powerhouse

The Harley-Davidson SV Big Twin V-Twin Flathead, affectionately known as simply the "Flathead," is a motorcycle engine that holds a legendary status in the history of motorcycling. It was produced by Harley-Davidson from 1937 to 1959, and its iconic design and robust performance defined an era for the brand. This engine, with its signature 45-degree V-shaped cylinder arrangement and overhead valve design, was a testament to innovative engineering and a commitment to durability. The Flathead was a true workhorse, powering a wide range of Harley-Davidson models, from the humble WL to the luxurious FL, and even finding its way into military applications during the Second World War. Its reputation for reliability and smooth power delivery made it a favorite among both riders and mechanics.

While the Flathead may be considered "old technology" by today's standards, its influence on the motorcycle world remains undeniable. It laid the groundwork for Harley-Davidson's future success, with its design principles influencing subsequent generations of engines. The Flathead powered a significant portion of the company's production, contributing to the establishment of Harley-Davidson as a leading motorcycle manufacturer. Today, restored Flatheads are highly sought-after by collectors and enthusiasts, their raw power and classic styling representing a golden age of motorcycling. Whether in the hands of a seasoned mechanic or a dedicated hobbyist, the Harley-Davidson SV Big Twin V-Twin Flathead remains a symbol of American ingenuity and a testament to the enduring appeal of classic motorcycle design.